22. Share-based payments

Share-based payments comprise charges for stock options and restricted stock awards to employees of the Group.

As of 31 December 2009, there was £79.3 million (2008: £84.0 million) of total unrecognised compensation cost related to the Group’s restricted stock plans. That cost is expected to be recognised over a period of one to two years.

Restricted stock plans

The Group operates a number of equity-settled share incentive schemes, in most cases satisfied by the delivery of stock from one of the Group’s ESOP Trusts. The most significant current schemes are as follows:

Renewed Leadership Equity Acquisition Plan (Renewed LEAP) and Leadership Equity Acquisition Plan III (LEAP III) Under Renewed LEAP and LEAP III, the most senior executives of the Group, including certain executive directors, commit WPP shares (‘investment shares’) in order to have the opportunity to earn additional WPP shares (‘matching shares’). The number of matching shares which a participant can receive at the end of the fixed performance period of five years is dependent on the performance (based on the Total Share Owner Return (TSR)) of the Company over that period against a comparator group of other listed communications services companies. The maximum possible number of matching shares for each of the 2009, 2008, 2007, 2006 and 2005 grants is five shares for each investment share. The 2005 Renewed LEAP plan vested in March 2010 at a match of 2.5 shares for each investment share.

Performance Share Awards (PSA) Grants of stock under PSA are dependent upon annual performance targets, typically based on one or more of: operating profit, profit before taxation and operating margin. Grants are made in the year following the year of performance measurement, and vest two years after grant date provided the individual concerned is continually employed by the Group throughout this time.

Leaders, Partners and High Potential Group Stock option grants under the executive stock option plan were not significant in 2009, 2008 or 2007 as the Group made grants of restricted stock (to be satisfied by stock from one of the Group’s ESOP trusts) to participants instead. Performance conditions include continued employment over the three-year vesting period.

Valuation methodology

For all of these schemes, the valuation methodology is based upon fair value on grant date, which is determined by the market price on that date or the application of a Black-Scholes model, depending upon the characteristics of the scheme concerned. The assumptions underlying the Black-Scholes model are detailed in note 26, including details of assumed dividend yields. Market price on any given day is obtained from external, publicly available sources.

Market/Non-market conditions

Most share-based plans are subject to non-market performance conditions, such as margin or growth targets, as well as continued employment. The Renewed LEAP and LEAP III schemes are subject to a number of performance conditions, including TSR, a market-based condition.

For schemes without market-based performance conditions, the valuation methodology above is applied and, at each year end, the relevant accrual for each grant is revised, if appropriate, to take account of any changes in estimate of the likely number of shares expected to vest.

For schemes with market-based performance conditions, the probability of satisfying these conditions is assessed at grant date through a statistical model (such as the Monte Carlo Model) and applied to the fair value. This initial valuation remains fixed throughout the life of the relevant plan, irrespective of the actual outcome in terms of performance. Where a lapse occurs due to cessation of employment, the cumulative charge taken to date is reversed.

The number of shares granted represents the ‘investment shares’ committed by participants at grant date for the 2009 LEAP III plan. The actual number of shares that vest for each Renewed LEAP/LEAP III plan is dependent on the extent to which the relevant performance criteria are satisfied.

The total fair value of shares vested for all the Group’s restricted stock plans during the year ended 31 December 2009 was £55.0 million (2008: £58.6 million, 2007: £31.7 million).